Pneumatic horse collar



1m31, 192s. K 1,657,701

l. J. THOMSEN PNEUMATI C HORSE COLL'AH Filed July 2i, 1927 v INVENTOR47. J THU/)45977,

BY {hl/IWW:

, A T1 -URNEY.

PATENT OFFICE.

INGEBEBT J'. THOHBEN, QF MINDEN, NEBRASKA.

PNEUIATIC HORSE COLLAR.

Application led July 21, 1927. Serial No. 207,446.

same degree of pressure. However, the contracted port or passage willprevent the sudden rush of air pressurefrom one cell to the other, inthe event that the load is suddenly shifted to one shoulder of thehorse. The arran ement is such that the device may be covere by a iap,and will not interfere with the harnessand will be protected.

1n the accompanying drawings, formin a part of this specification, andin whic like numerals are employed to designate like parts throughoutthe same,

Figure 1 is -a front side elevation of a pneumatic collar embodying myinvention,

Figure 2 is a similar view of the two cells included in the collar,

Figure 3 is an enlar sect-lon through the1 lower ends of the cel partsin elevation, Figure 4 is a transverse section taken on line 4 4 ofFigure 3. l

In the drawings herein :for the purpose of illustration, is shown apreferred embodiment of my invention, the numeral designates the outercasingl of a horse collar, which may be formed of leatheror the like.This casing includes shoulder sections 11 to engage the oppositeshoulders of the horse. The casin 10 is rovided at its inner edge with arolf or bead 12, whichmay be stuffed with straw or the hke. The usualstrap means 13 is employed to connect the upper ends of the shouldersections 1 1. vThe bead 12 and shoulder-sections 11 are preferablycontinuous at the bottom.

The numeral 14 designates a air of pneumatic sacks or cells, preferab yformed of rubber, and of a shape, and size to lit within the shouldersections 11. These cells are se arate, as shown.

e numeral 15 designates a combined in.- ating and pressure retardingdevice, em-

bodying a tubular body portion 16 carrying at its ends necks 17,provided with radlally projecting fianges 18. The lower ends of thecells 14 are adapted to be applied to the necks 17, and forced over theflanges 18,

thus being securely held upon the necks and effecting airftightv joints.The cells 14 being separate, either may be removed, without disturbingthe other. The tubular body portion 15 is provided in its upper portionwith a forwardly extending horizontal screw-threaded bore 19, receivingatubular member 20, having screw-threaded engagement therewith. Thetubular member 1s 1nternally threaded at 21 for engagement with thescrew-threaded portion 22 of a check valve device, embodying an inwardlyopening check valve 23, to engage upon a seat 24. The check valve deviceis preferably of the construction usually employed upon pneumatic tires,and the invention is in no sense restricted tothe precise form of checkvalve device employed, the one shown being used simply for the purposeof illustration.'

The'tubular body'20 has its outer end covered by a removableqcap 25.'The bore of the tubular body is provided with a radial port 27, incommunication with a longitudinal port '28, formed throu h the tubularbody portion 15 and necks 1 The port 28 is in permanent freecommunication with the two cells 14. The port 28 has a restricted orreduced diameter and I. have found that by giving the same a diameter ofabout one-fourth of an inch, that satisfactory results are obtainable..By providing the restricted port 28, both cells 14 are in permanent freecommunication, whereby they ma receive air pressure from the commonating valve and both cells will be inflated at the' same pressure. Whenthe load is suddenly shifted to one shoulder only, of the horse, therestricted port 28 will retardthe sudden rush of air pressure from onecell to the other, and properly and radually .equalize the pressure inthe ce pro ortion to the load.

T e device 15 is located beneath the bottom of the continuous bead 12,and is protected thereby, and covered by a heavy iiap 29, which may bestitched' tothe bead 12. This device is, therefore, fully protected andis out of the way of other parts of the harness.

In the use of the collar, it is a plied to the horse in the usualmanner. Wphen it is lll - withthe tubular dium of the usual hose. Airpresxurevv'illJ desired to inate the collar, the cap is.y removed and a'pump suitably -connected ody 20 through the mepass throu h'the bod ,port27, and o'rt 28,y to both c 14, whibh will be" the same pressure.Afterinlntion, the hose is removed from the tubular body and the cap 25returned in place` upon this tubular body and a ilap'29 employed tocover the cap 25. Both cells 14 are in permanent communication with eachother and as the load varies slightly upon the shoulders-of the horse,the pressure may pass through the contracted port 28, from one celltothe other. However, should the load be atly or rapidly increaseduponone shoul er the contracted port 28 will revent the sudden passageof airressure om one cell to the other. Hence t e' contracted port will serveto dautomatically equalize the pressure in thel two cells.

It is to be understood that the form of my inventiomrherevvithfshown anddescribed, 1s to be taken as a preferred example ofthe same, and thatvarious changes in the shape,

of m invention, or

ated at 1 claim ing a air of side'sections, cells size and arrangementof parts mag .be resorted to without departing from t e spirit the scopeof the subjoine claim. y

Having thus described my invention, I

In a horse collar, an outer casing comprisarranged in the si e sectionsand adapted to be inflated,

a se arabe coupling arran ed at the bottom of t e side sections' andaving extensions inserted within ,the ends of the cells, said couplinghaving a. contracted bore of unobstructed uniform diameter ythroughoutits length and placin the cells. in permanent communication wit eachother for equalizing the pressure in the cells and retardng the suddenrush of air from one cell to the other,.and check valve inlating deviceconnected with the coupling and leading into the bore without obstructinsuch bore, whereby both cells may be simultaneously inflated at `thesame 'degree of pressure by the air passing through the. contractedbore. In testimony; whereof I afiix m iignature.

INGEBERT J. THi) SEN. 1

